Gentoo penguins (Pygoscelis papua) stop along the penguin highway to ponder a strange nearby sound. To create this image, I mounted the camera on a small stand, placed it in the highway, and controlled it remotely. The penguins did not pay any attention to the camera until the shutter clicked. The sound of the click gave the penguins pause, as it is something they are not normally accustomed to hearing. Sea Lion Island, Falkland Islands